Storage battery



C. H. EVERETT STORAGE BATTERY July 22, 1930.

Fild April 12, 1926 Patented July 22, 1930 UNITED STATES PATENT OFFICE F GLAUD H. EVERETT, OF LONDON, ENGLAND, ASSIGNOR OF'ONE-HALF TO GEORGE R. CARR, OF CHICAGO, ILLINOIS STORAGE BATTERY Application filed April 12,

My invention relates to the terminal connections of storage battery plates, my object being the provision of a terminal connection that will give a flexible joint with perfect electrical contact having no resistance, which. obviates corrosion, loosening, and bad contact at terminals; will enable a layman to open up the battery as for inspection'and washing and which will have other advantages, some of which will be hereinafter men- 'tioned and advantages which without the mention thereof, will be appreciated by those skilled in the art. My invention consists in the battery terminal connections constructed as described by or included within the appended claims. y

In the accompanying drawings:

Fig. 1 is a vertical section through enough.

of a battery cell to illustrated my invention;

Fig. 2 is a'detail view in elevation. Referring to the drawings 10 designates a jar of usual or any desired construction and 11' the lug or strap to which the group of like plates are attached and which has on its 5 upper side the single terminal .for the group with whi'ch the, cable or connector is connected. Said terminal 12 is of ball form and extends above the top of the strap thru a hole 13 in the jar top and being connected with the strap by a shank or neck 14. The cable or connector 15 ends in a socket 16 that has a spherical cavity 17 that fits the ball,- said cavity being more than a hemisphere in extent, and the socket being split to provide a removable side section 18 to enable the socket to be applied to and removed from the ball. The socket cavity opens at its lower end into a circular hole larger in diameter than the adjacent ball neck so as to allow some degree of movement of the socket on the ball and thus aflord a certain degree of flexibility in the joint without in any wise impairing extended electrical contact between s'ocket'and ball. The socket has its exterior screw-threaded '45 for the reception of a clamping nut 19 which tightly binds'the two parts of the socket upon the ball. Preferably the exterior threaded portion of the socket is slightly tapering so as to assure the desired clamping action of 0 the. nut-upon the socket. The cable 15 and 1926. Serial No. 101,504.

socket are joined by inserting the cable end in a hole in the socket and burning them together.

Surrounding the assembled socket and terminal is a shell or cup 20 of hard rubber which at its lower end is threaded externally to engage thread in the jar top hole 13 and is also threaded internally to engage a threaded enlargement 21 of the ball neck. The cup 20 has a center hole in its top for the passage of the cable or connector. The space within the cup around the socket and ball is filled with some non-corrosive acid proof paste 23 such as a preparation known on the market as No-Ox-Id grease or the like and thereby the terminal parts are kept free from corrosion and otherwise in good conductive condition and especially is it a protection against the action of electrolyte that might tend to creep up the parts. The cup 20 is formed 7 exteriorly for the application of a wrench to readily turn the same and remove it and replace it.

It is evident that by my invention not only are the conditions fulfilled which the electrical requirements call for, but mechanically the construction is admirable and one that requires no special or expert knowledge for the separation and re-assemblage of parts requiring to be removed to give access to the jar interior.

What I claim is:

1. A terminal connection for the plates of storage batteries comprising a ball and socket, the socket having a portion in contact with the ball that is movable to permit the ready separation of socket and ball, and means to hold the ball engaging portions of the socket from disengagement with the ball.

2. A terminal connection for the plates of storage batteries comprising a ball and socket, the socket having a portion in contact with the ball that is movable to permit the ready separation of socket and ball, and means to hold the ball engaging portions of the socket from disengagement with the ball, the ball being supported by the plate strap by a neck.

- 3. A terminal connection for the plates of storage batteries comprising a ball and sock et, the socket being split and having a clamping member upon its exterior to hold the socket in closed position upon the ball.

4. A terminal connection for the plates of storage batteries comprising a ball and socket, the socket being split and being externally threaded and having a nut engaging such thread to hold the socket in closed position upon the ball.

In testimony whereof I hereunto alfix my signature.

CLAUD H. EVERETT. 

